<div class="pro_left">
    <div class="pro_tit">{$this_action.title}</div>
    <div class="list">
        <ul>
            {volist name='category' id='vo'}
            <li class="{if condition='$pid==$vo.id'}list_on{/if}">
                <a href="{:url('index/products',['pid'=>$vo.id])}">{$vo.name}</a>
                {if condition='$vo.son'}
                <i></i>
                <div class="list02">
                    <ul>
                        {volist name='vo.son' id='v'}
                        <li>
                            <a href="{:url('index/products',['pid'=>$v.id])}">{$v.name}</a>
                            {if condition='$v.son'}
                            <i></i>
                            <div class="list03">
                                <ul>
                                    {volist name='v.son' id='o'}
                                    <li><a href="{:url('index/products',['pid'=>$o.id])}">{$o.name}</a></li>
                                    {/volist}
                                </ul>
                                <div class="cl"></div>
                            </div>
                            {/if}
                        </li>
                        {/volist}
                    </ul>
                    <div class="cl"></div>
                </div>
                {/if}
            </li>
            {/volist}
        </ul>
        <div class="cl"></div>
    </div>
</div>